California Regulators Order PG&E to Shut Gas Pipeline

California regulators on Tuesday ordered PG&E Corp.'s utility to shut down a natural-gas pipeline near San Francisco while state investigators check to see whether it is safe to operate.

A state court ordered PG&E to shut down the pipeline late Friday after officials from the city of San Carlos, where the pipe is located, expressed concern about its safety. In that case, city officials cited internal PG&E emails they...